This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

为什么 usart0接了外部上电的GPRS模块,仿真器就无法烧写。

一旦烧写烧错,就需要拔开usart0,并且仿真器重新上电,才可以烧写,如果烧写OK,再接上usart0,这时调试又不正常了,附上一张原理图。